How many gallons of blood are in an adult human body?
About 1 gallon or 8 pints for a 150 pound male about 3/4 gallon or 6 pints in a 110 pound female.
The amount of blood in the human body depends upon size based upon weight.
An average man of 150 pounds will have about 8 pints or 1 gallon of blood.
A woman of 110 pounds will have about 6 pints or 3/4 of a gallon.